A tilted neck may cause a bulge on one side of the neck when swallowing food, but this condition may also be caused by thyroid abnormalities or neck tumors, etc. Patients are advised to go to the hospital to improve the relevant examinations. A tilted neck means that the patient’s head is tilted to one side, and patients with a tilted neck may develop a neck lump. Generally, the lump occurs in the middle and lower part of the sternocleidomastoid muscle, and it is more common in the right side. In patients with a tilted neck, the mass is mostly pike shaped and has no significant tenderness. Therefore, a bump on the side of the neck when swallowing food may be caused by a strabismus. If the lump that appears on the neck moves up and down with swallowing, it may be due to a thyroid abnormality. It may be an enlarged thyroid gland or a condition such as hyperthyroidism or thyroid nodules. Patients are advised to go to the hospital for thyroid function, thyroid ultrasound, thyroid antibodies and other tests for further clarification. In addition, if there is a neck tumor, this may also occur, and patients are advised to go to the hospital for further examination in time to identify the cause of the disease and then carry out the relevant treatment.